1/4 a^{}_{} b^{a1,a2}_{c0,a0} c^{c1,c2}_{a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c0) a+(a0) a-(c2) a-(c1)
+1/8 a^{}_{} b^{a1,a2}_{c0,a0} c^{c1,c2}_{a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c0) a+(a0) a-(c2) a-(c1)
-1/4 a^{}_{} b^{a2,a3}_{c0,a1} c^{c1,c2}_{a0,a4} lambda2^{a1,a4}_{a2,a3} a+(c0) a+(a0) a-(c2) a-(c1)
-1/2 a^{}_{} b^{a1,a2}_{c1,a0} c^{c0,c1}_{a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(a0) a-(c0)
-1/4 a^{}_{} b^{a1,a2}_{c1,a0} c^{c0,c1}_{a3,a4} lambda2^{a3,a4}_{a1,a2} a+(a0) a-(c0)
+a^{}_{} b^{a1,a3}_{c1,a0} c^{c0,c1}_{a2,a4} eta1^{a4}_{a3} a+(a0) a+(a2) a-(a1) a-(c0)
+1/2 a^{}_{} b^{a2,a3}_{c1,a1} c^{c0,c1}_{a0,a4} lambda2^{a1,a4}_{a2,a3} a+(a0) a-(c0)